Effect evaluation of ethylene vinyl acetate/nano-montmorillonite pour-point depressant on improving the flow properties of model oil

• Published in: Colloids and surfaces. A, Physicochemical and engineering aspects Vol. 555; pp. 296 - 303
• Main Authors: Li, Na, Mao, GuoLiang, Wu, Wei, Liu, Yang
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 20.10.2018
• Subjects: Action mechanism; Ethylene vinyl acetate; Flow properties; Nanocomposite pour point depressant; Wax crystal; Action mechanism; Nanocomposite pour point depressant; Flow properties; Wax crystal; Ethylene vinyl acetate
• ISSN: 0927-7757; 1873-4359
• DOI: 10.1016/j.colsurfa.2018.06.065

[Display omitted] •A novel and effective nano-hybride polymeric pour-point depressant suitable for the transportation of crude oil.•The performance of nano-hybride pour point depressant is more adapt to the crude oil with high wax content.•Action mechanism of EVA/nano-MMT PPD studied through rheological properties and microscopic observation.•Diagram description of the interaction between EVA/nano-MMT PPD and wax. A series of novel nano-hybrid pour-point depressants (PPDs) which combined nano-montmorillonite (MMT) and ethylene vinyl acetate (EVA) copolymers were prepared. Compared with pure EVA PPDs with identical content, the effects of EVA/nano-MMT PPDs on the cold flow properties of 25 wt% wax model oil were evaluated. Polarized optical microscopy was used to study the effect of the EVA/nano-MMT PPDs on the crystallization behavior and crystal morphology of the model oil at low temperature. The results indicated that the vinyl acetate content of EVAs has a significant impact on the performance of EVA/nano-MMT PPDs, and appropriate dosage of the EVA/nano-MMT PPDs can be more effective than EVA PPDs in modifying the wax crystal morphology, preventing their aggregation and improving the fluidity of model oil at low temperatures.